Update .gitignore for pure Python/FastHTML project

- Add data/ directory and SQLite journal files
- Add comprehensive environment file patterns
- Add requirements*.txt pattern (using pyproject.toml instead)
- Better organization of ignore patterns

Author: michael-borck

.gitignore

@@ -26,15 +26,24 @@ htmlcov/
 cover/
 
 # Virtual Environments
-.env
 .venv
 env/
 venv/
 ENV/
 
+# Environment files
+.env
+.env.local
+.env.development
+.env.production
+.env.*
+
 # Project specific
 .curriculum_curator/
 output/
+data/
+*.db-journal
+*.db-wal
 
 # macOS
 .DS_Store
@@ -80,4 +89,7 @@ dist/
 build/
 
 # Reference implementations (read-only)
-reference-implementations/
+reference-implementations/
+
+# Old requirements files (we use pyproject.toml)
+requirements*.txt